Strap for Seamaster Aqua Terra 150M Master Chronometer Small Seconds 38 Stainless Steel / Sand - Diamond / Bracelet

The lug width of model 220.10.38.20.59.001 is 19mm. It is always measured from inside to inside of the case lugs. This dimension is crucial for full compatibility: a strap of different width will not fit correctly into the lugs.

It depends on intended use. For formal elegance we recommend natural alligator or artisanal vegetable-tanned calf leather. For everyday versatility, shell cordovan or silk plain weave NATO are refined choices. For those alternating humid climates, a structured FKM rubber offers superior resistance without aesthetic compromise.

Omega typically provides a small elastic spiral spring that passes through the lugs. For safe replacement: keep the case stable, remove the spring with a dedicated tool (spring bar tool), insert the new spring into the new strap, then secure the spring to the case lugs by applying gentle pressure until it clicks into place.

Yes. Any strap with 19mm lug width is compatible. MilanoStraps offers artisanal straps in alligator, calf, shell cordovan, NATO and rubber, all customizable for the Aqua Terra. Casati Milano creates bespoke pieces by appointment with direct leather selection and 18-month warranty.

A quality leather strap (alligator, calf or shell cordovan) worn daily typically lasts 3–5 years before noticeable wear becomes significant. The patina that develops is desirable. Critical factors: humid environment shortens lifespan (2–3 years), while dry environments extend it (5–7 years). A rubber strap resists 5–8 years with consistent care.